Function ParseVersionNumbers

src/butil/version.cc:25–52

Parses the |numbers| vector representing the different numbers inside the version string and constructs a vector of valid integers. It stops when it reaches an invalid item (including the wildcard character). |parsed| is the resulting integer vector. Function returns true if all numbers were parsed successfully, false otherwise.

// is the resulting integer vector. Function returns true if all numbers were
// parsed successfully, false otherwise.
bool ParseVersionNumbers(const std::string& version_str,
                         std::vector<uint16_t>* parsed) {
  std::vector<std::string> numbers;
  SplitString(version_str, '.', &numbers);
  if (numbers.empty())
    return false;

  for (std::vector<std::string>::const_iterator it = numbers.begin();
       it != numbers.end(); ++it) {
    int num;
    if (!StringToInt(*it, &num))
      return false;

    if (num < 0)
      return false;

    const uint16_t max = 0xFFFF;
    if (num > max)
      return false;

    // This throws out things like +3, or 032.
    if (IntToString(num) != *it)
      return false;

    parsed->push_back(static_cast<uint16_t>(num));
  }
  return true;
}

// Compares version components in |components1| with components in
// |components2|. Returns -1, 0 or 1 if |components1| is less than, equal to,